what are the consideration and the requirements of the environmental part that should be taken when designing a bridge over a river in regards to the feasibility study.

As I am required to write a feasibility study about the environmental when designing the bridge over a river connecting two residential areas.

What are the subjects (field and laboratory data) that would go as enclosure with the geotechnical report for assisting design purposes?

Find the required rectangular cross-sectional area for a tied reinforced concrete column which should support a load of 300 tons. Use 4000 psi concrete, ultimate steel stress of 60,000 psi and 4% steel.

Contractor performed considerable work on a project. Owner then became insolvent, leaving Contractor unpaid. Contractor tried to recover payment from the undisbursed construction loan proceeds being held by Owner's bank. Contractractor argued that it was a beneficiary of the loan agreement between bank and Owner. Bank refused to make payment.

Discussion

Do you agree with the Contractor's argument? Does the bank have any contractual obligation to disburse the unused loan to the contractor? How would you prevent this kind of financial risk?

A horizontal curve has a deflection angle delta equal to 7° 01’ 24” a degree of curvature equal to 2° 00’ , and a PI station of 57 + 36.56. Using conventional U.S. units, compute the curve data and the PC and PT stations. Using conventional U.S. units, compute the deflection angles (in degrees, minutes, and seconds) at even 100 ft stations for the curve.

Please explain how you calculate the deflection angle with details.

Estimate the total cost for furnishing and installing standard size brick (6.75 bricks/SF) in a running bond pattern for the above referenced building 300 feet long, 200 feet wide and 12 feet high. Calculate only the brick units and the mortar required.

a. Total area of wall openings: 650 SF

b. Brick waste factor: 5%

c. Mortar required per 100 SF: 7.2CF/CSF

d. Mortar waste factor: 40% e. Productivity Rates: 12.0 Mason-hours/1000 brick and 13.0 Laborer-hours/1000 brick

f. Wage Rates: Masons – $28.00/hr and Laborers - $22.00/hr

g. Material Costs: Brick - $615/M and Mortar - $140/CY

GROSS WALL AREA SF /1 NET WALL AREA SF - ?

TOTAL BRICK REQUIRED BRK /1 BRICK MATERIAL COST $ LS - ?

TOTAL MORTAR REQUIRED CF /1 MORTAR MATERIAL COST $ LS - ?

TOTAL MATERIAL COST $ LS /1 MASON HOURS REQUIRED HRS - ?

LABORER HOURS REQUIRED HRS - ?

TOTAL LABOR COST $ LS - ?

TOTAL COST $ - ?

An existing 36-inch diameter concrete gravity sewer installed on a slope of 0.25% currently conveys a peak flow rate of 12 cfs. A builder proposes to connect a new residential development to this existing sewer. Projected peak flow from this new development is 4 cfs.

a) Depth of flow in sewer before new development is connected

b) Depth of flow in sewer after new development is connected

c) Flow velocity in sewer after new development is connected

d) Flow type (critical, subcritical or supercritical) after new development is connected

e) Diameter of a sewer to convey combined peak flow of 16 cfs if maximum allowable D/d is 0.85 (i.e. assume you are designing new sewer on the same 0.25% slope)

Please show all work. Thank you so much in advance!

Sketch a 5 kg thin flat uniform homogeneous square plate of side 600 mm, with a circular opening of radius 100 mm. Determine the area and the mass moments of inertia about the center of mass.

A concrete mix is required for reinforced concrete wave breaker at seashore where frequent mild freezing and thawing is dominant. A specified compressive strength of 25 MPa is required at the age of 28 days, and the size of the section and reinforcement dictate using a maximum aggregate size of 19 mm. The company had no history of testing concrete used. The coarse aggregate meets the ASTM grading requirements. It has absorption of 2%, a BSG (D) of 2.70 and a unit weight of 1550 kg/m3. The fine aggregates have absorption of 1%, a BSG (D) of 2.7 and a fineness modulus of 2.7. Both coarse and fine aggregates are used while dry. For each bag of cement (50 kg); calculate the number of containers of coarse and fine aggregate equivalent to required mass quantities. The volume of each container is 20 liters; and the loose density of the coarse and fine aggregates are 1250 and 1200 kg/m3, respectively.

Discuss remediation verification storage.

A small city is situated on the countryside. Upstream form the city is a dam that provides the city's water supply. If the dam was overtopped by water, then the dam would fail and all of the water would flood through the city. There is also a danger that the dam might collapse when it is full of water and cause it to fail, also flooding the city.

A) Draw a fault tree for the head event “Dam fails and floods the town” using the following basic events The possibility of dam collapse is (P=0.01)

There is a weakness in the dam that would allow collapse to cause the dam to fail (P=0.1).

Storm occurs that overtops the dam provided that it is mostly full (P=0.002)

Storm occurs that will overtop the dam no matter how full the dam is (P=0.0004)

Dam is mostly full (P=0.4).

B) Determine the probability that the dam will fail and flood the town. For the hours of daylight (assume 12 hours on average) there is someone working at the dam who could send a warning to the city if the dam failed.

There is an 80% probability that this person would be able to get the message to the city in time to evacuate. If the dam failed during the night no one would see it, but there is a 60% chance that the weather conditions would be such that the noise of the dam breaking could be heard by someone in the city and give them enough warning to evacuate everybody.

However, every Saturday night the city has a large party, and nobody would be able to hear if the dam failed anyway.

C) Draw an event tree that can be used to determine the conditional probability that the city will receive warning in time to evacuate.

D) Determine this conditional probability of receiving the warning on time.

E) What is the overall probability that the town will be flooded without an evacuation occurring? Hint: consider your answer for (b).

Why is precise stability analysis of slopes difficult to predict?

What is the difference between the Stability Number method and the Method of Slices?

A strip footing 2.5 m wide is loaded on the ground surface with a pressure equal to 175 kPa. Calculate the stress distribution at depths of 2.5, 7.5 and 12.5 m under the center of the footing. If the footing rested on a normally consolidated cohesive layer whose Cc was 0.612 and whose e0 was 1.35 , estimate the settlement of the footing. Assume S = 100%,γ’ = 7.5 kN/m3 , and the total clay layer thickness beneath the footing = 15 m.

Explain how the use of a shear key below a retaining wall foundation would provide resistance against sliding. How would you as a designer account and quantify the resistance developed by the use of a shear key? Finally, why is the contribution of the shear key so significant for such a small addition?